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Finding the Fourth Proportional to 2,639.88, 3,957.63 and 995.52

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Solution

The fourth proportional to 2,639.88, 3,957.63 and 995.52 is: 1,492.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.88 : 3,957.63 = 995.52 : x
  2. Step 2: Convert to fraction form
    2,639.88/3,957.63 = 995.52/x
  3. Step 3: Cross multiply
    2,639.88x = 3,957.63 × 995.52
  4. Step 4: Simplify right side
    2,639.88x = 3,939,899.82
  5. Step 5: Solve for x
    x = 3,939,899.82/2,639.88
  6. Step 6: Final answer
    x = 1,492.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.